What is the Tellabs CM3566-R6?
The Tellabs CM3566-R6 is an equipment module, listed by the manufacturer as "PIM1 MODULE, 21X E1, 120R". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
Manufactured by Tellabs, the CM3566-R6 (PIM1 MODULE, 21X E1, 120R) is an equipment module. Circular Telecom sources, tests, and resells surplus and refurbished Tellabs equipment like this as part of a lower-carbon alternative to new procurement.
Common Questions
The Tellabs CM3566-R6 is an equipment module, listed by the manufacturer as "PIM1 MODULE, 21X E1, 120R". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
Circular Telecom sources and resells surplus and refurbished Tellabs network equipment, including parts such as the CM3566-R6, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue